GONTEN TS XVII 
JAEGER (F. M.). Some remarks concerning the Röntgenograms obtained 
by means of mica-piles composed by crossed lamellae. 676. 
Jurrius (W. H.) and P. H. van Crrrerr. The general relativity theory 
and the solar spectrum. 522. 
— presents a paper of Dr. H. C. Burger: “The process of solidification 
as a problem of conduction of heat.” 616. 
— presents a paper of Dr. W. Koster Dz.: “On the theory of hysteresis 
according to VOLTERRA. 663. 
— presents a paper of Dr. H. C. BurGer and P. H. vaN CITTERT: 
“Measurements on the intensity of spectrum lines by the aid of the 
echelon.” 790. 
— presents a paper of Miss Rassa RIWLIN: “Photographic absorption- 
and extinction-measurements. Contributions to the study of liquid 
crystals. V. Extinction-measurements.” 807. 
— presents a paper of Mr. ALpH. DEUMENS: “Extinction by a blackened 
photographic plate as function of wavelength, quantity of silver, and 
size of the grains.” 848. 
— Mutual influence of neighbouring Fraunhofer lines. 1113. 
KAMERLINGH ONNEsS (H.) v. ONNEs (H. KAMERLINGH). 
KAPTEYN (J. C.) presents a paper of Dr. A. PANNEKOEK: “The distance 
of the dark Nebulae a Taurus.” 707. Further remarks. 720. 
KAPTEYN (W.) presents a paper of Dr. N. G. W. H. Beecer: “Bestimmung 
der Klassenzahl aller Unterkörper des Kreiskörpers der m-ten Einheits- 
wurzeln.” (Verbesserung). 1399. 
KARSSEN (A), N. H. KorkMEYER and J. M. Bisvoet. Investigation by 
means of x-rays of the crystalstructure of sodium-chlorate and sodium- 
bromate. 644. 
— and J. M. Biuvoer. Research by means of Röntgen-rays on the 
structure of the crystals of lithium and some of its compounds with 
light elements. I. 1365. 
KeEESOM (W. H.). The quadrupole moments of the oxygen and nitrogen 
molecules. 939. 
— The cohesion forces in the theory of vAN DER WAALS. 943. 
— On the deviations of liquid oxygen from the law of Curis. 1127. 
KLEYN (A. DE). On the effect of tonic labyrinthine and cervical reflexes 
upon the eye-muscles. 509. 
— and R. Maanus. The function of the otolithes. 907. 
— Experiments on the quick component phase of vestibular nystagmus 
in the rabbit. 1357. 
Krras and Pulu Labuan (N. W. Borneo) (On the age of the tertiary oil- 
bearing deposits of the peninsula of). 1142. 
tee aes 95 
Proceedings Royal Acad, Amsterdam. Vol. XXIII, 
